Graduate student Sean Hartzell and Dr. Amber Pitt published a note in Herpetological Review reporting the occurrence of the Eastern Musk Turtle (Stenotherus odoratus) in Montour County, PA. This represents a northern range extension for this native Pennsylvania species known as the "stinkpot" turtle. The turtle, pictured at right, is one of the smallest turtle species in the United States.
Check out their note:
Hartzell, S.M. and A.L. Pitt. 2015. Geographic Distribution: Sternotherus odoratus (Eastern Musk Turtle): USA: Pennsylvania: Montour County. Herpetological Review 46(4): 566.